Pipe cutter



A ril 10, 1928; 1,665,212

c. H. LA MOTTE PIPE CUTTER I Filed June 21. 1926 Inventor Charles H L aMoff i The Y to facilitate the work of cutting cast iron -plp es terial ota similar crystalline character.

ing an 'fannu'lar yoke CHARLES vta":ilufo ril' tg or some,eom a ammbgtime) e P rn' CUTTER, I

I Application file djiTunee2l, principal object of the inventionis or those whichi are composed ofma- ",A further object is to providefa device which will accomplish the desired". result in.

a very rapid yet highly efficient manner. A still further ob-ject'is to' providejade- YviceWvh'ich may be need in restrictedquari i I ters, will be extremely simple-to operate andwhich byreason ofits compact chara'ctermaybe handle'dwith unusual ease.

The principal feature consists inuprovid formed of separable sections adaptedgtoebe closed around a pipe and having sharp ch'iseledge'd'members extending inwardly therefrom presenting a substantially continuous, circularedgei which forced into pressure Contact with the outer surface of the pipe and forms a fracture line-around'its. perimeter.

"In the drawings, Figure-1 is an eleva tional view showing the complete device in a closed position.

Figure 2 isa' plan viewlof the device illus 7' ftrate'dinFigureLj' Figurejfii isja sectional detail takenon the line 33 of Figure 1 showing the arrangement :of the sharp chisel-edged blade members and the manner f'in'which} they. I are se cured in the yoke members. i v 7 lengths fhasnsually', required considerable time and labour on the part of the work- 7 men since it was necessary to rotatea cumbersome cutter head around ipe in order to cutthroughits'wall.v '7 'Very' often hard spots or'c'hilled sections in, the texture of thepipe were encountered which rendered the "cutter useless'and the work was-accordingly delayed, or other 1mprovised'methods'were resort-ed towhich o ffered small assurance of obtammgsthe desired results. i I

i The present device has been'constructed with a view to entirely eliminating the above'difiiculties by varying the principle employed from that of severing'the pipe by cutters to a device which is adapted to re ceive' a sharpblow, the shock of which is imparted directly to the pipe 1n a concen-' trated manner, being confined to a line of zero Width continuous with the periphery thereof.

In. the'construction of the device herein,

' shown a pairof "ed with a recess individual blade section's in -pla'c e;; r 7;,

' N otches 7 are formed in the base portion I z of the blade se ti ns tp'clear the bolts sand! effectivelypreventcircumferentialmovement f will conform to provide .a sharp and substan- The-cutting 0f cast'i ron pipes to suitable When itis desired'to out swung back over the-lug 9;

through which a pin "3 pivotalconnection between the two members :1 to permit them to be swung-apart to allow the yoke to encirclethepipel 7 Each of the members fl formed as shown from "twoseparate .m'em-j bars, the "l'nee'ting faces of whichfarejprovid-' 4 which is. preferably undercut'as shownin or'dereto' receive the base center-cunt yoke members, 7 1 are provided which arejfo'rined withlugsj 2,;

passes to provide'a is {preferably portionofthe segn'iental',blade'fsections'b,

.w iich blades increase in "width. toward the 5 base. [Bolts 6 are passed through thememg hers I securely bindingthe sections together and confining'the' blade sections '5"thereb e v tween, thelbase of the segmental'blades 5 fitting snugly within the recess 4, the f uiidercut walls of which" engage and lockf'the';

of, the'bladesil V i When the blades-are thus secured in, position and the device is closed around a pipe,

as shown 4 inl Figure '1,*'of the drawings, the

apeXor edges of all ofthe cutter segments tially continuous'circularedge on the members-l on the side opposite the A pin 10 is "inserted through the lug andfextends therebeyond ateach side and receives the link members llwhichextend 3 past the leg 9 [and have mounted there between a*'rotata ble' spindle 12 onwhich-is irigidlysecure dthe eccentric cam member l3. J ,7 ,95 "h1g9 andvupon being rotated it forcesthe The cam 13 engages the undersideie of] the members 1 together. I 1 v v a pipe, the link- 5 IHeaVy lug'extensions 8 and"9'are"formed members 11 are released and'swung clear.

of the lug 9 and the members' lfare then" swung apart, passed around the pipe and then closed together and the "links, lizare i The cam member 13 is then rotated by means of a wrench applied to the squared end 15 12 to'which the cam is secured.

of the spindle conforming edge-s As the cam is rotated, it engagesthe outer side l t'of the lug 9, forcing the members 1. 2 "together andicausing the I of the cutter members to be forced into inti-.

lie 1' mate engagement with the outer surface of V tlieQpipe ,cutter members to bite very slightly into tliefhard outer skin of the pipe. p i l 7 This operation having been completed; the

-. In practice the nembers impa 1 W h u b ka e *the hammer or sledge.

hardened and tempere and causing the sharp-edges of the members 1 are then strucka sharpblow on itheiri outer periphery with a hammer or *s lg the pipe through the and the "shock being "imparted to jjripliery, and results 1n the breaking or sevcring= Qftllt); pipe in a clean fracture; Such a device is part cularly adaptable "for use iii cutting pipes, having a crystalline structure such as cast metal or tile, the resuits-have beenfhighly successfuland a'clean, accurate break in the pipe is assured,-

' 1 of the device or they, may in order that to resist the y are preferably drop forgiiigs be cast from malleable stock they inay be sufficiently strong when struck The cutter blades are tions; to avoid breakage and are suitably their sharp cuttingedge;

1 g r The device can vlpipe,

ensure be. constructed to any-size inorder ,tOELCGOHHDqdate the various sizes of audits extremely rugged character ill long continued service. It. will of course be und'erstood ous changes may that varisecure the cutter vblades n the device in ya ,riousi'ways.

It will be at onoe apparent that a device such as described may beemployed in very restricted quarters and that avery material circling member of circular form means constricting said member around. a P1136, and sharp blades carried by said saving of time will be effected by its use.

' Whatl claiin'as myjinvention is v 1. A pipe cutter comprising a, pipe-enfor V encircling memberada-pted upon the constriction of thelatter nember. to present a circumferential edge pipeencircling member,

A shai'pedges of the cutftelff ineiiihers only, concentrated on the r pipe n afline of zero Width formed inshort sec-' din order to preserve 1 member rot-atabl-y: mounted in said R be 'madeiin the structure gether. 1 of the device While still residing'within the scope of the A invention, it being possible to;

. being formed of cesses 1n theadpining together and in rigid contact continuous with the periph ery ofthe pipe. I .i up I i 2. A pipe'cutter, comprising a separable said member 111 a" closed position around the pipe, and sharp cutting blades carried by said pipe-encircling member adapted upon the securing of the lattermember in its'clOsed position to present a circumferential edge in rig d engagementcontinuous with the per phery of the pipe.

of segmental icutter p and extending nwai'dly edge, and means foifforcing said yoke menimeans for, securing oo 3. A pipe cutter, comprising a pair orseparable yoke members each liavingaseries blades secured thereto V therefrom and forming a" substantially continuous circular I bers together to cause the edge ot'said cutter blades to engage in pressure contact. x

4. A ipi e cutter comprisii g a 'paiu'oi semi-circu ar joke memberspivoted together atone side and having a series'o't segmental cutterblafdes secured thereto and extending inwardly therefrom 3 and forming a substan tially continuous circular edge, a lug -eX-' the surface of the pipe tending outwardly from eachfo't' saidfyoke means pivoted atone end; to one lugs and enibracingtbeothe'r lug, and a cam pivotal members on the side opposite the; pivot,

means and adapted to engage the latter lug vvlien'rotated to force said ,yolre members to- I a pipe cut er, a yoke member'iormed ot aspair of semi-circular members pivotaliy connected together at 'oneside each member I tvvo sectlons undercut re- I V blades in said recesses.

' CHARLES ii. LA o'r'rnf 

